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A018014
Powers of cube root of 13 rounded up.
21
1, 3, 6, 13, 31, 72, 169, 398, 935, 2197, 5166, 12147, 28561, 67157, 157908, 371293, 873035, 2052796, 4826809, 11349444, 26686341, 62748517, 147542765, 346922421, 815730721, 1918055941, 4509991466, 10604499373, 24934727222, 58629889046, 137858491849
OFFSET
0,2
LINKS
MATHEMATICA
Ceiling[Surd[13, 3]^Range[0, 30]] (* Harvey P. Dale, Nov 06 2013 *)
Table[Ceiling[13^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 09 2014 *)
PROG
(Magma) [Ceiling(13^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 09 2014
CROSSREFS
Cf. powers of cube root of k ceiling up: A017981 (k=2), A017984 (k=3), A017987 (k=4), A017990 (k=5), A017993 (k=6), A017996 (k=7), A018002 (k=9), A018005 (k=10), A018008 (k=11), A018011 (k=12), this sequence (k=13), A018017 (k=14), A018020 (k=15), A018023 (k=16), A018026 (k=17), A018029 (k=18), A018032 (k=19), A018035 (k=20), A018038 (k=21), A018041 (k=22), A018044 (k=23), A018047 (k=24).
Sequence in context: A130582 A126296 A293911 * A358937 A162483 A187780
KEYWORD
nonn
EXTENSIONS
More terms from Vincenzo Librandi, Jan 09 2014
STATUS
approved